The causes of the fires were unknown and investigation of both incidents continues, authorities said.

Firefighters responding to the 3 a.m. report of a commercial building on fire on King Street in Brookings, arrived to find a recreational vehicle and a carport completely involved in flames. At one point a transformer on a nearby power pole exploded, said Harbor Fire Chief John Brazil.

Firefighters were able to contain the fire and limited damage to an attached two-story building, Brazil said.

Nobody was injured in the blaze, he said. Two Harbor fire engines and one Brookings engine responded to the call, he said.

The fire may have started in a fifth-wheel trailer parked in the carport, but an exact cause had not been determined yet, Brazil said.

At 9 a.m., Harbor firefighters responded to a fire reported in a storage unit next to Little Bay Motors on Highway 101 in Harbor.

“The fire started in one unit and then hit the ceiling and started to spread,” Brazil said. “We opened up the roof to vent the fire and we were able to knock it down with water before it could reach the other units.”